tag:blogger.com,1999:blog-378357358243436521.post9098117370489227771..comments2024-03-28T03:18:40.051-04:00Comments on Life, Unbounded: Oasis EarthAnonymoushttp://www.blogger.com/profile/01991701536947708899noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-378357358243436521.post-78488168463322640042011-02-24T14:10:38.086-05:002011-02-24T14:10:38.086-05:00Well, even the Earth was not "Earth-like"...Well, even the Earth was not "Earth-like" during most of its history. Its had a breathable atmosphere (for us) for less than 1 billion years.kurt9https://www.blogger.com/profile/02101147267959016924noreply@blogger.comtag:blogger.com,1999:blog-378357358243436521.post-89383301956226122222011-02-13T19:12:48.501-05:002011-02-13T19:12:48.501-05:00I think Earth is not rare and mars is the proof. M...I think Earth is not rare and mars is the proof. Mars may look dry and cold now, but it is an earth-like planet, it has a different timing, that´s allAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-378357358243436521.post-61829375823540394772011-02-13T18:24:13.254-05:002011-02-13T18:24:13.254-05:00Earth may well be rare, but who says earths (or at...Earth may well be rare, but who says earths (or at least planets with an earth-like history) are the best place for life anyway?<br /><br />We are still suffering from having a sample size on one!<br /><br />PAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-378357358243436521.post-36510283019618685102011-02-11T14:35:30.274-05:002011-02-11T14:35:30.274-05:00Perhaps had their not been a moon-forming impact, ...Perhaps had their not been a moon-forming impact, the Earth might be one of those water worlds.kurt9https://www.blogger.com/profile/02101147267959016924noreply@blogger.comtag:blogger.com,1999:blog-378357358243436521.post-62221236017770454982011-02-11T12:38:17.726-05:002011-02-11T12:38:17.726-05:00As much as it pains me to say so (!) then on face ...As much as it pains me to say so (!) then on face value then yes. However, this is a tricky statement to make - it could well be that had the Earth *not* formed a Moon in the way that it did then it would have gotten lots of water some other route (e.g. by not being fried during the pre-lunar Theia impact) because both the local and system-wide dynamical evolution would have then been different anyway - everything is connected. And of course this particular hypothesis (late, low D/H delivery to just Earth) may be incorrect.Anonymoushttps://www.blogger.com/profile/01991701536947708899noreply@blogger.comtag:blogger.com,1999:blog-378357358243436521.post-45384307348342446472011-02-11T12:30:30.805-05:002011-02-11T12:30:30.805-05:00If we got most of our water from a single chance i...If we got most of our water from a single chance impact, does this not make for a rare Earth?kurt9https://www.blogger.com/profile/02101147267959016924noreply@blogger.com